<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>ajaxPost请求</title>
    <script src="jquery.js"></script>
</head>
<body>
    <form action="index.html" method="post" enctype="application/x-www-form-urlencoded" >
        <input type="text" name="username" placeholder="请输入用户名"><br>
        <input type="password" name="password" placeholder="请输入密码"><br>
        <button type="submit">登录</button>
         </form>
</body>
<script>
    // AJAX:Asynchronous javascript and xml
    // 异步的js与xml
    // 在不重载页面的情况下更新页面数据
    $('form').submit(function(ev){
        // 阻止默认事件的发生
        ev.preventDefault()
        console.log('ss')
        // 获取表单数据，自动转换城字符串序列化队
        // name=value&name=value
        var data = $(this).serialize()
        $.post('index.html',data,function(resData){

        })

        })
</script>
</html>